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When I run python3 myscript.py foo bar 123 then sys.argv holds the value ['myscript.py', 'foo', 'bar', '123']. I'd like to access the name of the command itself (python3 in this case). How can I do that?

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  • Isn' t it always python3 if you are running python 3? What could this be useful for? Commented Sep 14, 2019 at 12:44
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    @liakoyras It could be python3.7 or /usr/bin/python Commented Sep 14, 2019 at 12:49
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    I don't believe that's possible from the python script, though I could certainly be wrong. Do you just need to know which version of python you are running: sys.version_info? Commented Sep 14, 2019 at 12:51
  • Which operating system?? Which command shell? Commented Sep 14, 2019 at 13:04
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    @IanRehwinkel: Use the module psutil and get the commandline, find the pythonX process running your .py. Commented Sep 14, 2019 at 13:49

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Using the psutil module (can be found here), it is possible to retrieve all command line arguments used: 

psutil.Process().cmdline()

It returns a list of strings, including the command used to start the python interpreter (e.g. /usr/bin/python3).

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